Daewoo Refrigerator Error Code RT

The RT code on a Daewoo refrigerator indicates a fault with the room temperature sensor, also called the ambient temperature sensor. The control board has detected either a short circuit or a wire disconnection in that sensor circuit. When this fault is active, the fuzzy logic function that adjusts cooling based on the surrounding room temperature is disabled. The refrigerator may still operate, but not at full smart-control capability.

The refrigerator may continue to cool with the RT error active, but it will operate without the ambient temperature compensation feature that fuzzy mode relies on. This means it may not respond optimally to hot or cold room conditions. It is generally safe to continue using the unit short-term, but the fault should be repaired to restore full control performance and avoid potential overcooling or undercooling issues.

Repair costs vary depending on the cause. If only a connector needs reseating or a wire needs repair, the cost can be minimal, primarily the cost of a service call if a technician is involved. Replacing the RT sensor itself typically falls in the range of a low-cost parts replacement, often between $10 and $40 for the part. If the control board is at fault, parts and labor can range from $150 to $350 or more depending on the model and service rates in your area.

Yes, in many cases the repair is approachable for a technically confident DIYer. Start by unplugging the refrigerator, then locate the RT sensor and inspect its wiring harness and connectors for any breaks, loose connections, or corrosion. If the wiring appears intact, the sensor element itself may need to be tested or replaced. If those checks do not resolve the fault, a professional technician should evaluate the control board.

A reset may temporarily clear the displayed code, but if the underlying sensor or wiring fault is still present, the RT error will return once the control board re-checks the sensor circuit. A reset is not a fix for this error. The physical cause, whether a broken wire, short circuit, or failed sensor, must be identified and corrected for the code to stay cleared.